Splitting the Computer Screen

I take a lot of flap (especially from fellow blogger "Panther Fan" about promoting how one splits a computer screen.  In an Apple, you either have to pay for a $7 piece of software which allows you to do it fairly easily or you can just drag the ends of the browser and make it smaller or larger.  It is much easier in a Microsoft based computer, though as you can see from the video above.  So why would you want to do it.  How many times have you printed an e-mail so you can read it while working on your laptop.  For me, I have my students look at their e-book and then work on a project at the same time and then do the same myself when preparing lesson plans.